Enhancing the mechanical strength of Multi Jet Fusion–printed polyamide 12 and its glass fiber-reinforced composite via high-temperature annealing
Multi Jet Fusion (MJF) is a pioneering and highly efficient powder bed fusion additive manufacturing technique. However, even with the addition of reinforced glass fibers (GFs), MJF-printed polyamide 12 (PA12) objects still have lower mechanical strength as compared to many commercial polymer compos...
| Main Authors: | , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Online Access: | https://hdl.handle.net/10356/159870 |
| _version_ | 1811697777594335232 |
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| author | Liu, Xiaojiang Tey, Wei Shian Choo, Jasper Yeng Chee Chen, Jiayao Tan, Pengfei Cai, Chao Ong, Adrian Zhao, Lihua Zhou, Kun |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Liu, Xiaojiang Tey, Wei Shian Choo, Jasper Yeng Chee Chen, Jiayao Tan, Pengfei Cai, Chao Ong, Adrian Zhao, Lihua Zhou, Kun |
| author_sort | Liu, Xiaojiang |
| collection | NTU |
| description | Multi Jet Fusion (MJF) is a pioneering and highly efficient powder bed fusion additive manufacturing technique. However, even with the addition of reinforced glass fibers (GFs), MJF-printed polyamide 12 (PA12) objects still have lower mechanical strength as compared to many commercial polymer composites. In this work, a high-temperature (173 °C, near the onset melting temperature of PA12) annealing process is developed to remarkably enhance the mechanical strength of MJF-printed PA12 and GF/PA12 composites. Specifically, the ultimate tensile strength (UTS)/tensile modulus of PA12 and GF/PA12 specimens are increased by 20.8%/48.5% and 22.8%/30.6%, respectively. The mechanical performance of GF/PA12 specimens is better than that of previously reported MJF- and Selective Laser Sintering (SLS)-printed PA12, glass bead/PA12, and GF/PA12 composites. Moreover, the melting temperatures of both PA12 and GF/PA12 specimens are increased by more than 5 °C after the annealing process. Further experimental results reveal that the crystallinity increase is the primary enhancement mechanism of the high-temperature annealing. It is envisioned that a similar approach can also be applied to other SLS- and MJF-printed polymers and composites for mechanical enhancement. |
| first_indexed | 2024-10-01T08:00:39Z |
| format | Journal Article |
| id | ntu-10356/159870 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T08:00:39Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1598702022-07-05T01:42:58Z Enhancing the mechanical strength of Multi Jet Fusion–printed polyamide 12 and its glass fiber-reinforced composite via high-temperature annealing Liu, Xiaojiang Tey, Wei Shian Choo, Jasper Yeng Chee Chen, Jiayao Tan, Pengfei Cai, Chao Ong, Adrian Zhao, Lihua Zhou, Kun School of Mechanical and Aerospace Engineering HP-NTU Digital Manufacturing Corporate Lab Singapore Centre for 3D Printing Engineering::Mechanical engineering Multi Jet Fusion 3D Printing Multi Jet Fusion (MJF) is a pioneering and highly efficient powder bed fusion additive manufacturing technique. However, even with the addition of reinforced glass fibers (GFs), MJF-printed polyamide 12 (PA12) objects still have lower mechanical strength as compared to many commercial polymer composites. In this work, a high-temperature (173 °C, near the onset melting temperature of PA12) annealing process is developed to remarkably enhance the mechanical strength of MJF-printed PA12 and GF/PA12 composites. Specifically, the ultimate tensile strength (UTS)/tensile modulus of PA12 and GF/PA12 specimens are increased by 20.8%/48.5% and 22.8%/30.6%, respectively. The mechanical performance of GF/PA12 specimens is better than that of previously reported MJF- and Selective Laser Sintering (SLS)-printed PA12, glass bead/PA12, and GF/PA12 composites. Moreover, the melting temperatures of both PA12 and GF/PA12 specimens are increased by more than 5 °C after the annealing process. Further experimental results reveal that the crystallinity increase is the primary enhancement mechanism of the high-temperature annealing. It is envisioned that a similar approach can also be applied to other SLS- and MJF-printed polymers and composites for mechanical enhancement. This study is supported under the RIE2020 Industry Alignment Fund – Industry Collaboration Projects (IAF-ICP) Funding Initiative, as well as cash and in-kind contribution from the industry partner, HP Inc., through the HP-NTU Digital Manufacturing Corporate Lab. 2022-07-05T01:42:58Z 2022-07-05T01:42:58Z 2021 Journal Article Liu, X., Tey, W. S., Choo, J. Y. C., Chen, J., Tan, P., Cai, C., Ong, A., Zhao, L. & Zhou, K. (2021). Enhancing the mechanical strength of Multi Jet Fusion–printed polyamide 12 and its glass fiber-reinforced composite via high-temperature annealing. Additive Manufacturing, 46, 102205-. https://dx.doi.org/10.1016/j.addma.2021.102205 2214-7810 https://hdl.handle.net/10356/159870 10.1016/j.addma.2021.102205 2-s2.0-85111795258 46 102205 en Additive Manufacturing © 2021 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Multi Jet Fusion 3D Printing Liu, Xiaojiang Tey, Wei Shian Choo, Jasper Yeng Chee Chen, Jiayao Tan, Pengfei Cai, Chao Ong, Adrian Zhao, Lihua Zhou, Kun Enhancing the mechanical strength of Multi Jet Fusion–printed polyamide 12 and its glass fiber-reinforced composite via high-temperature annealing |
| title | Enhancing the mechanical strength of Multi Jet Fusion–printed polyamide 12 and its glass fiber-reinforced composite via high-temperature annealing |
| title_full | Enhancing the mechanical strength of Multi Jet Fusion–printed polyamide 12 and its glass fiber-reinforced composite via high-temperature annealing |
| title_fullStr | Enhancing the mechanical strength of Multi Jet Fusion–printed polyamide 12 and its glass fiber-reinforced composite via high-temperature annealing |
| title_full_unstemmed | Enhancing the mechanical strength of Multi Jet Fusion–printed polyamide 12 and its glass fiber-reinforced composite via high-temperature annealing |
| title_short | Enhancing the mechanical strength of Multi Jet Fusion–printed polyamide 12 and its glass fiber-reinforced composite via high-temperature annealing |
| title_sort | enhancing the mechanical strength of multi jet fusion printed polyamide 12 and its glass fiber reinforced composite via high temperature annealing |
| topic | Engineering::Mechanical engineering Multi Jet Fusion 3D Printing |
| url | https://hdl.handle.net/10356/159870 |
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